Asymmetrical Filtering Impairments Mitigation for Digital- Subcarrier-Multiplexing Transmissions Enabled by Multiplication-free K-State Reserved Complex MLSE

TL;DR

This paper introduces a multiplication-free complex MLSE method to reduce filtering impairments in high-speed digital-subcarrier-multiplexing optical transmissions, achieving improved noise performance without complex calculations.

Contribution

It presents a novel multiplication-free K-state reserved complex MLSE technique specifically designed for mitigating asymmetrical filtering impairments in DSCM systems.

Findings

Achieved 1.63dB optical-to-noise ratio improvement over real MLSE.

Successfully transmitted 90 GBaud DSCM DP-16QAM over 14 WSSs without multiplications.

Demonstrated effectiveness of the proposed method in a high-speed optical communication setup.

Abstract

We propose a multiplication-free K-state reserved complex maximum-likelihood-sequence-estimation (MLSE) to mitigate asymmetrical filtering impairments in digital-subcarrier-multiplexing transmissions. A required optical-to-noise ratio of 1.63dB over the conventional real MLSE is obtained after transmitting 90 GBaud DSCM DP-16QAM signal over 14 WSSs without multiplications.